Data Normalization

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Clinical Data Normalization

Clinical data comes in all different forms even for the same piece of information. For example, age could be reported as 40 years for an adult, 18 months for a toddler or 3 days for an infant. Without normalization, data can’t be used as a single a dataset.

Un-normalized Normalized (days) Normalized (months)
40 years 1436 47
18 months 543 18
3 days 3 0.1

Data normalization is at the heart of secondary use of clinical data. If the data is not comparable between sources, it can’t be aggregated into large datasets and used reliably to answer research questions or survey populations from multiple health organizations.